Method op adjusting the stroke of trip-hammers



LUTHER BRIGGs, JR., 0E

BRAINTREE, MASSACHUSETTS.

` METHOD 0F ADJUSTING THE STROKE 0F TRIP-HAMMERS.

Specification of Letters Patent No, 7,965, dated March 11, 1851,

To @ZZ whom t may concern:

Be it known that I, LUTHER BRIGGS, Jr., of Braintree, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Trip- Hammers; and Ihereby `declare that the following is a fulland exact description; The accompanying sheet of drawings represents my improvements, and forms a part `of these specifications.'`

i Figure .1,`is'an isometrical perspective view of the machine. Fig. 2,-isa geometrical transversesection of thelnuckle joints, and a portionof the lifting leg, showing the manner in which the lifting leg `passes through the joint.

In the drawings, A, represents the hammer, B, the anvil, C, thehelve, D, the lift- 1 joint at I-I for ing leg, E, the elevator consisting of the arm F, and the claw` G, and having `a knuckle grasping the lifting leg when acted on by the cams I, I, which revolve with the shaft K to which `the power is applied. j j

L is the regulator which consists of an inclined plane workingtransversely of the machine, in twoappropriate grooves in the vertical supports M, M, its oice being to raise or depress the eleva-tor at. pleasure.

The operation of my improved trip hammer will readily be perceived to be as follows: The shaft K being propelled by any convenient kind of motive power, operates upon the lifting `leg of the hammer, not directly as is commonly the case, but through the medium of the elevator E. The lifting leg D being grasped anywhere, along its lengthV by the joints Hof the elevator E, which in turn is governed by the regulator L, under the direction of the operator, thus it will be seen that my improved trip hammer is entirely under the control of the hammerman; the combined action of the lifting leg D, the elevator E, and the regulator L, enabling him, to strike at pleasure,

any sized blow, on any sized piece of iron.

It will readily be perceived that the form of the machine might be somewhat altered,

without in any degree abandoning its peculiar principles and operations; as for instance, the elevator might be placed over the helve, instead of beneath it, as in the drawings; and the regulator might be constructed in the form of a screw, eccentric, or any equivalent contrivance, for the simple inclined plane exhibited by the drawings, for raising and depressing the elevator.

Having thus described my invention, some of its advantages I deem to be as follows: First, simplicity and cheapness of its construction, and second, its peculiar adaptability to `water power, 'while at the same time, it seems to combine nearly all the capacities and facility of regulation of the steam hammers;

What I claim as my invention, and desire to secure by Letters Patent, is The construction of a trip hammer, in which the hammer is raised by cams, not acting directly, upon the hammer or the helve, or a projection, from the same, commonly called the lifting leg; but by the intervention of a movable joint so constructed, as to grasp, or clutch, the lifting leg at any required height, the position of the same, being governed by the regulator, whichmay be constructed in the form of an inclined plane or any equivalent contrivance, for raising and depressing the joints at the will of the operator, the whole being constructed to perform the peculiar services substantially in the manner hereinbefore set forth in this my specification.

LUTHER BEiGes, JR. 

